Of one-half to



J. EMMNER, Jr.

DYNAMO ELEGTRIG MACHINE.

No. 390,955. Patented Oct. 9, 1888.

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J EMMNER J r DYNAMO ELECTRIC MACHINE.

No. 390,955. Patented Oct. 9, 1888.

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JULIUS EMMNER, JR, OF \VASHIXGTON, DISTRICT OF COLUMBIA, ASSIGKOR OF ONEHALF TO JOSEPH A. SETTLE, OF SAME PLACE.

R56 iJlACiiiNE.

SPECIFICATION forming part of Letters Patent No. 390,955, dated Qc-tcber 9, 1888.

Application filed April 18, 185 8.

To aZZ whom it may concern:

Be it known that 1, JULIUS EMMNER, Jr., a citizen of the United States, residing at ash ington, in the District of Columbia, have in- 5 vented certain new and useful Improvements in Armaturcs for Dynamo-Electric Machines and Motors; and I do hereby declare the following to be a full, clear, and exact description of theinvention, such as willenableothersskilled [O in the art to which it appertains to make and use the same.

This invention relates to dynamo-electric machines. The object is to produce a ring or cylindrical armature for dynamo-electric 1113- chines so constructed that the coils may read ily and rapidly be removed, when desired, for the purpose of replacing them, when worn or injured by accident or otherwise, with others, and by displacing but few parts. Furthermore, the object is to produce a ring or cylindrical armature so formed that any particular coil may be removed without displacing any other coil or any other section of the ring than that to which the particular coil is attached;

and, finally, the object of the invention is to produce a ring or cylindrical armature for a dynamo-electric machine of such construction that all the parts shall easily be accessible to air, in order that they may be prevented from 0 becoming heated, Sac.

With these objects in view the invention consists in a ring or cylindrical armature comprising a drum, a series of sections provided on one side with a tongue or projection and on the other side with a groove entered by the tongue of the adjacent section and detachably connected thereto, the grooves in the sections extending to one of the edges of the sections, in order that any one section may be removed without displacing the adjacent sections.

Furthermore, theinvention resides in a ringarmatnre comprising a suitable drum and a series of ring-sections so formed that when joined they shall make a complete ring of such 5 shape as to allow a free circulation of air.

Furthermore, theinvention consists in a ring or cylinder armature comprising a drum and a series of removable ring-sections having con necting tongues or projections and retaining 5o them a short distance from the surface of the drum; and, finally, the invention consists in Serial No. 271,007. (No model.)

various novel details of construction whereby the objects of the invention are attained and the effectiveness of the invention is insured.

I have iliustrated the invention in the 210- 53 companying drawings, in which Figure 1 is a perspective view 01' a ring armature made in accordance with my invention. Fig. 2 is an end elevation of the armature. Fig. 3 is a sectional view of one of the rib sections, the tongue or connection being shown broken away. Fig. e is a detail perspective view showing the side plate of the ring-section to which the tongue is attached. Fig. 5 is a detail perspective view of the plate forming the side of the ring-section opposite to that upon which the tongue is attached or formed, showing the groove entered by the tongue of the adjacent section. Fig. 6 1s a perspective view of the sleeve upon which the wire is wound, it being shown as composed of strips secured together and with interposed insulating-strips. Fig. 7 is a perspective view of a sleeve made of layers separated by insulating material, and Fig. Sis a view showing a modified form of ring-section.

In the drawings, the letter A designates a drum, made of brass or other non-magnetic metal, keyed or otherwise permanently at tached to a shalt through which the drum re So ceives motion. Secured to the periphery of this drum is a series of sections, 13, attached to the drum by suitable screws or bolts, 1), pass ing through the sections and entering the drum a suitable distance to hold them securely in place. The sections 53 are composed of a se ries of plates, 5', the outer plates on one side of each of the sections being provided with a projecting tongue, D of a breadth somewhat less than that of the plate to which it is attachcd orwith which it is formed. The plate on the opposite side of the section is formed with a groove or slot, Z2, extending to one end of the plate, and is entered by the tongue of the adjacent section. The portion of the sections between the outer plates is composed of plates of soft iron, insulated from each other by any suitable material and held in place by retaining bolts or screws.

Between the sections B of the armature, and supported by theprojectionsortongues thereof, are the sleeves G, each composed of a number KOO of strips, bands, or layers of metal insulated from each other. Upon these sleeves are wound the wires 0, as shown in Fig. 2 of the drawings.

In Fig. 6 of the drawings I have shown the sleeve as composed of a series of strips or hands insulated from each other, while in Fig. 7 I have shown the sleeve as composed of aseries of insulated layers of metal. These two constructions are considered equivalents of each other.

In Fig. 8 of the drawings I have shown a modified form of the ringsection. In this form the side plates bearing the tongue and groove, respectively, are connected at their lower ends by a plate, 0, which has an opening to receive a screw passed through the drum for the purpose of securing the section thereto. By the employment of this form the necessity of passing the retaining-screw completely through the section is obviated.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. An armature for dynamo -electric machines, comprising a drum, a series ofring-sections attached thereto and provided on one side with a tongue and on the other with a groove, and coils placed on the tongues, substantially as described.

2. An armature for dynamoelectric machines, comprisingadrum, aseries of ring-sections provided on one side with a tongue and on the other with a groove extending to the end and attached to the drum, and coils placed upon the tongues, substantially as described.

3. An armature for dynamo electric machines, comprising a drum and a series of ringsections attached to the drum, made up of metal plates insulated from each other, the said sections being provided with tongues on one side and with grooves on the other, substantially as specified and described. I

4. An armature for dynamo electric machines, comprising adrum, aseries of ring-sections, each provided on one side with a tongue and on the other with a groove, and the sleeves composed of a series of strips, layers, or hands of metal insulated and having the wire wound thereon, the said sleeves being placed on the h tongue, substantially as described.

5. An armature for dynamo-electric machines, comprising a drum, a series of ringsections attached thereto, made up of plates insulated from each other, the said sections being provided with interlocking tongues and grooves, and the sleeves composed ofinsulated strips, bands, or layers placed upon thetongues and carrying the wire.

6. An armature for dynamo -electric machines, comprising a drum and aseries of ringsections attached thereto, each section being provided with a tongue and with a groove extending to the edge, substantially as described.

In testimony whereof Iaiiix my signature in presence of two witnesses.

JULIUS EWMNER, JR.

Vitnesses:

DAVID H. llIEAD, \V. WV. MORTIMER. 

